I have buid a subagent whose is_background: true。I test it in the cusor ide，the main agent can fire and forget. But I test it in the cursor acp or cursor cli，the main agent must wait for the subagent to the end. My cursor cli version is 2026.03.30-a5d3e17. Is this feature currently not supported ?
Hey, thanks for the request.
Yeah, this is a known limitation. is_background: true for subagents currently works properly in the IDE, but in CLI/ACP mode background subagents still behave like blocking. The team is aware, but there’s no ETA for a fix yet.
For now, the workaround is to test background subagents in the IDE. Let me know if you have any other questions.